ATLANTA — Georgia lawmakers will debate rules today that could allow more mentally ill people to carry firearms, though hasty changes may blunt some of the impact. The issue arose as House Republicans make a last-minute push on legislation permitting school districts to arm their employees and allowing those licensed to carry a gun to take their weapons into bars, churches and college campuses. That bill and a host of others must be approved by at least one chamber in the General Assembly by today or risk failing for the year.